2161582 has 4 divisors (see below), whose sum is σ = 3242376. Its totient is φ = 1080790.

The previous prime is 2161571. The next prime is 2161591. The reversal of 2161582 is 2851612.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540394 + ... + 540397.

It is an arithmetic number, because the mean of its divisors is an integer number (810594).

2^2161582 is an apocalyptic number.

2161582 is a deficient number, since it is larger than the sum of its proper divisors (1080794).

2161582 is a wasteful number, since it uses less digits than its factorization.

2161582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080793.

The product of its digits is 960, while the sum is 25.

The square root of 2161582 is about 1470.2319544888. The cubic root of 2161582 is about 129.2976321790.

The spelling of 2161582 in words is "two million, one hundred sixty-one thousand, five hundred eighty-two".